<!DOCTYPE html>
<html lang="zh-cn">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style>
        div {
            width: 50%;
            height: 50px;
            margin-left: auto;
            margin-right: auto;
            margin-top: 20%;
            font-size: 36px;
            text-align: center;
            line-height: 50px
        }
    </style>
</head>

<body>
    <div>Hello Sky-Blue</div>
</body>

</html>
